Question

The number of permutations of the letters of the word $HONOLULU$ taken $4$ at a time is

• A. $354$
• B. $314$
• C. $210$
• D. $124$

Answer 1

The correct option is C $210$

$H-1$

$N-1$

$O-2$

$L-2$

$U-2$

Number of permutation $=\frac{n!}{r_1\times r_2\times ....\times r_n}=\frac{8!}{(2!{)}^{3}4!}=210$